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Wörmeyer L, Nortmann O, Hamacher A, Uhlemeyer C, Belgardt B, Eberhard D, Mayatepek E, Meissner T, Lammert E, Welters A. The N-Methyl-D-Aspartate Receptor Antagonist Dextromethorphan Improves Glucose Homeostasis and Preserves Pancreatic Islets in NOD Mice. Horm Metab Res 2024; 56:223-234. [PMID: 38168730 PMCID: PMC10901624 DOI: 10.1055/a-2236-8625] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/05/2024]
Abstract
For treatment of type 1 diabetes mellitus, a combination of immune-based interventions and medication to promote beta-cell survival and proliferation has been proposed. Dextromethorphan (DXM) is an N-methyl-D-aspartate receptor antagonist with a good safety profile, and to date, preclinical and clinical evidence for blood glucose-lowering and islet-cell-protective effects of DXM have only been provided for animals and individuals with type 2 diabetes mellitus. Here, we assessed the potential anti-diabetic effects of DXM in the non-obese diabetic mouse model of type 1 diabetes. More specifically, we showed that DXM treatment led to five-fold higher numbers of pancreatic islets and more than two-fold larger alpha- and beta-cell areas compared to untreated mice. Further, DXM treatment improved glucose homeostasis and reduced diabetes incidence by 50%. Our data highlight DXM as a novel candidate for adjunct treatment of preclinical or recent-onset type 1 diabetes.
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Affiliation(s)
- Laura Wörmeyer
- Department of General Pediatrics, Neonatology and Pediatric Cardiology, Medical Faculty and University Hospital Düsseldorf, Heinrich Heine University Düsseldorf, Düsseldorf, Germany
- Institute of Metabolic Physiology, Heinrich Heine University Düsseldorf, Düsseldorf, Germany
| | - Oliver Nortmann
- Department of General Pediatrics, Neonatology and Pediatric Cardiology, Medical Faculty and University Hospital Düsseldorf, Heinrich Heine University Düsseldorf, Düsseldorf, Germany
- Institute of Metabolic Physiology, Heinrich Heine University Düsseldorf, Düsseldorf, Germany
| | - Anna Hamacher
- Institute of Metabolic Physiology, Heinrich Heine University Düsseldorf, Düsseldorf, Germany
| | - Celina Uhlemeyer
- Institute for Vascular and Islet Cell Biology, German Diabetes Center (DDZ), Leibniz Center for Diabetes Research, Heinrich Heine University Düsseldorf, Düsseldorf, Germany
- German Center for Diabetes Research (DZD e.V.), Helmholtz Zentrum München Deutsches Forschungszentrum für Gesundheit und Umwelt, Neuherberg, Germany
| | - Bengt Belgardt
- Institute for Vascular and Islet Cell Biology, German Diabetes Center (DDZ), Leibniz Center for Diabetes Research, Heinrich Heine University Düsseldorf, Düsseldorf, Germany
- German Center for Diabetes Research (DZD e.V.), Helmholtz Zentrum München Deutsches Forschungszentrum für Gesundheit und Umwelt, Neuherberg, Germany
| | - Daniel Eberhard
- Institute of Metabolic Physiology, Heinrich Heine University Düsseldorf, Düsseldorf, Germany
| | - Ertan Mayatepek
- Department of General Pediatrics, Neonatology and Pediatric Cardiology, Medical Faculty and University Hospital Düsseldorf, Heinrich Heine University Düsseldorf, Düsseldorf, Germany
| | - Thomas Meissner
- Department of General Pediatrics, Neonatology and Pediatric Cardiology, Medical Faculty and University Hospital Düsseldorf, Heinrich Heine University Düsseldorf, Düsseldorf, Germany
| | - Eckhard Lammert
- Institute of Metabolic Physiology, Heinrich Heine University Düsseldorf, Düsseldorf, Germany
- Institute for Vascular and Islet Cell Biology, German Diabetes Center (DDZ), Leibniz Center for Diabetes Research, Heinrich Heine University Düsseldorf, Düsseldorf, Germany
- German Center for Diabetes Research (DZD e.V.), Helmholtz Zentrum München Deutsches Forschungszentrum für Gesundheit und Umwelt, Neuherberg, Germany
| | - Alena Welters
- Department of General Pediatrics, Neonatology and Pediatric Cardiology, Medical Faculty and University Hospital Düsseldorf, Heinrich Heine University Düsseldorf, Düsseldorf, Germany
- Institute for Vascular and Islet Cell Biology, German Diabetes Center (DDZ), Leibniz Center for Diabetes Research, Heinrich Heine University Düsseldorf, Düsseldorf, Germany
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Fotino C, Molano RD, Ben Nasr M, Umland O, Fraker CA, Ulissi U, Balasubramanian HB, Lunati ME, Usuelli V, Seelam AJ, Khalefa SA, La Sala C, Gimeno J, Mendez AJ, Ricordi C, Bayer AL, Fiorina P, Pileggi A. Reversal of Experimental Autoimmune Diabetes With an sCD39/Anti-CD3 Treatment. Diabetes 2023; 72:1641-1651. [PMID: 37625134 PMCID: PMC10588287 DOI: 10.2337/db23-0178] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/03/2023] [Accepted: 08/16/2023] [Indexed: 08/27/2023]
Abstract
Extracellular (e)ATP, a potent proinflammatory molecule, is released by dying/damaged cells at the site of inflammation and is degraded by the membrane ectonucleotidases CD39 and CD73. In this study, we sought to unveil the role of eATP degradation in autoimmune diabetes. We then assessed the effect of soluble CD39 (sCD39) administration in prevention and reversal studies in NOD mice as well as in mechanistic studies. Our data showed that eATP levels were increased in hyperglycemic NOD mice compared with prediabetic NOD mice. CD39 and CD73 were found expressed by both α- and β-cells and by different subsets of T cells. Importantly, prediabetic NOD mice displayed increased frequencies of CD3+CD73+CD39+ cells within their pancreata, pancreatic lymph nodes, and spleens. The administration of sCD39 into prediabetic NOD mice reduced their eATP levels, abrogated the proliferation of CD4+- and CD8+-autoreactive T cells, and increased the frequency of regulatory T cells, while delaying the onset of T1D. Notably, concomitant administration of sCD39 and anti-CD3 showed a strong synergism in restoring normoglycemia in newly hyperglycemic NOD mice compared with monotherapy with anti-CD3 or with sCD39. The eATP/CD39 pathway plays an important role in the onset of T1D, and its targeting might represent a potential therapeutic strategy in T1D. ARTICLE HIGHLIGHTS
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Affiliation(s)
- Carmen Fotino
- Cell Transplant Center, Diabetes Research Institute, University of Miami, Miami, FL
| | - R. Damaris Molano
- Cell Transplant Center, Diabetes Research Institute, University of Miami, Miami, FL
| | - Moufida Ben Nasr
- International Center for T1D, Pediatric Clinical Research Center “Romeo ed Enrica Invernizzi,” Department of Biomedical and Clinical Science L. Sacco, University of Milan, Milan, Italy
- Nephrology Division, Boston Children's Hospital, Harvard Medical School, Boston, MA
| | - Oliver Umland
- Cell Transplant Center, Diabetes Research Institute, University of Miami, Miami, FL
| | - Christopher A. Fraker
- Cell Transplant Center, Diabetes Research Institute, University of Miami, Miami, FL
- Division of Cellular Transplantation, DeWitt Daughtry Department of Surgery, Miller School of Medicine, University of Miami, Miami, FL
| | - Ulisse Ulissi
- Cell Transplant Center, Diabetes Research Institute, University of Miami, Miami, FL
| | - Hari Baskar Balasubramanian
- International Center for T1D, Pediatric Clinical Research Center “Romeo ed Enrica Invernizzi,” Department of Biomedical and Clinical Science L. Sacco, University of Milan, Milan, Italy
| | - Maria Elena Lunati
- Division of Endocrinology, Azienda Socio-Sanitaria Territoriale (ASST) Fatebenefratelli-Sacco, Milan, Italy
| | - Vera Usuelli
- International Center for T1D, Pediatric Clinical Research Center “Romeo ed Enrica Invernizzi,” Department of Biomedical and Clinical Science L. Sacco, University of Milan, Milan, Italy
| | - Andy Joe Seelam
- International Center for T1D, Pediatric Clinical Research Center “Romeo ed Enrica Invernizzi,” Department of Biomedical and Clinical Science L. Sacco, University of Milan, Milan, Italy
| | - Salma Ayman Khalefa
- International Center for T1D, Pediatric Clinical Research Center “Romeo ed Enrica Invernizzi,” Department of Biomedical and Clinical Science L. Sacco, University of Milan, Milan, Italy
| | - Christian La Sala
- Cell Transplant Center, Diabetes Research Institute, University of Miami, Miami, FL
| | - Jennifer Gimeno
- Cell Transplant Center, Diabetes Research Institute, University of Miami, Miami, FL
| | - Armando J. Mendez
- Cell Transplant Center, Diabetes Research Institute, University of Miami, Miami, FL
- Division of Cellular Transplantation, DeWitt Daughtry Department of Surgery, Miller School of Medicine, University of Miami, Miami, FL
| | - Camillo Ricordi
- Cell Transplant Center, Diabetes Research Institute, University of Miami, Miami, FL
- Division of Cellular Transplantation, DeWitt Daughtry Department of Surgery, Miller School of Medicine, University of Miami, Miami, FL
- Division of Endocrinology, Department of Medicine, Miller School of Medicine, University of Miami, Miami, FL
- Department of Microbiology and Immunology, Miller School of Medicine, University of Miami, Miami, FL
- Department of Biomedical Engineering, University of Miami, Miami, FL
| | - Allison L. Bayer
- Cell Transplant Center, Diabetes Research Institute, University of Miami, Miami, FL
- Department of Microbiology and Immunology, Miller School of Medicine, University of Miami, Miami, FL
| | - Paolo Fiorina
- International Center for T1D, Pediatric Clinical Research Center “Romeo ed Enrica Invernizzi,” Department of Biomedical and Clinical Science L. Sacco, University of Milan, Milan, Italy
- Nephrology Division, Boston Children's Hospital, Harvard Medical School, Boston, MA
- Division of Endocrinology, Azienda Socio-Sanitaria Territoriale (ASST) Fatebenefratelli-Sacco, Milan, Italy
| | - Antonello Pileggi
- Cell Transplant Center, Diabetes Research Institute, University of Miami, Miami, FL
- Division of Cellular Transplantation, DeWitt Daughtry Department of Surgery, Miller School of Medicine, University of Miami, Miami, FL
- Department of Microbiology and Immunology, Miller School of Medicine, University of Miami, Miami, FL
- Department of Biomedical Engineering, University of Miami, Miami, FL
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AlQudah M, Khalifeh M, Al-Azaizeh R, Masaadeh A, Al-Rusan OM, Haddad HK. Hyperbaric oxygen exposure alleviate metabolic side-effects of olanzapine treatment and is associated with Langerhans islet proliferation in rats. Pathol Oncol Res 2022; 28:1610752. [PMID: 36590387 PMCID: PMC9801520 DOI: 10.3389/pore.2022.1610752] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/07/2022] [Accepted: 11/23/2022] [Indexed: 12/23/2022]
Abstract
Introduction: Olanzapine (OLZ) is one of the second-generation antipsychotics drugs (APDs) used to treat several psychiatric illnesses. Olanzapine treatment is often associated with many metabolic side effects in a dose dependent manner such as obesity, dyslipidemia and insulin resistance, induction of type II diabetes and acute pancreatitis in some patients. Methods: Hyperbaric Oxygen therapy (HBOT) was investigated as a tool to mitigate olanzapine metabolic side effects in rats. Thirty-six female Sprague Dawley (SD) rats were divided into 4 groups; rats on olanzapine treatment either exposed to hyperbaric oxygen therapy (HBOOLZ) or left without exposure (OLZ) then non-treated rats that either exposed to hyperbaric oxygen therapy or left without exposure (control). Rats received Hyperbaric Oxygen therapy for 35 days at 2.4 atmospheres absolute (ATA) for 2.5 h daily followed by intraperitoneal injection of olanzapine at 10 mg/kg or placebo. Results: Rats on either hyperbaric oxygen therapy or olanzapine had a significant loss in body weight. Olanzapine treatment showed a decrease in serum insulin level, triglyceride, highdensity lipoprotein (HDL) cholesterol, and lipase level but an increase in fasting blood sugar (FBS), insulin resistance index (HOMA-IR) and amylase, while rats' exposure to hyperbaric oxygen therapy reversed these effects. The Pancreatic Langerhans islets were up-regulated in both hyperbaric oxygen therapy and olanzapine treatments but the combination (HBOOLZ) doubled these islets number. Discussion: This study advocated that hyperbaric oxygen therapy can be an alternative approach to control or reverse many metabolic disorders (MDs) associatedwith olanzapine treatment. In addition, it seems that hyperbaric oxygen therapy positively affect the pancreatic Langerhans cells activity and architecture.
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Affiliation(s)
- Mohammad AlQudah
- Department of Pathology and Microbiology, Faculty of Medicine, Jordan University of Science and Technology, Irbid, Jordan,*Correspondence: Mohammad AlQudah,
| | - Mohammad Khalifeh
- Department of Veterinary Basic Sciences, Jordan University of Science and Technology, Irbid, Jordan
| | - Rasha Al-Azaizeh
- Department of Veterinary Basic Sciences, Jordan University of Science and Technology, Irbid, Jordan
| | - Amr Masaadeh
- Department of Pathology and Microbiology, Faculty of Medicine, Jordan University of Science and Technology, Irbid, Jordan,University of Iowa Hospitals and Clinics, Iowa City, IA, United States
| | - Omar M. Al-Rusan
- Department of Pathology and Microbiology, Faculty of Medicine, Jordan University of Science and Technology, Irbid, Jordan,Department of Pathology and Laboratory Medicine, School of Medicine, Emory University, Atlanta, GA, United States
| | - Husam K. Haddad
- Department of Pathology and Laboratory Medicine, Ministry of Health, Amman, Jordan
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Linhares CRB, Rabelo GD, Limirio PHJO, Venâncio JF, Ribeiro Silva IG, Dechichi P. Automated bone healing evaluation: New approach to histomorphometric analysis. Microsc Res Tech 2022; 85:3339-3346. [PMID: 35758056 DOI: 10.1002/jemt.24188] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/18/2021] [Revised: 05/16/2022] [Accepted: 06/10/2022] [Indexed: 12/23/2022]
Abstract
This study aimed to assess different approaches for bone healing evaluation on histological images and to introduce a new automatic evaluation method based on segmentation with distinct thresholds. We evaluated the hyperbaric oxygen therapy (HBO) effects on bone repair in type 1 diabetes mellitus rats. Twelve animals were divided into four groups (n = 3): non-diabetic, non-diabetic + HBO, diabetic, and diabetic + HBO. Diabetes was induced by intravenous administration of streptozotocin (50 mg/kg). Bone defects were created in femurs and HBO was immediately started at one session/day. After 7 days, the animals were euthanized, femurs were removed, demineralized, and embedded in paraffin. Histological sections were stained with hematoxylin and eosin (HE) and Mallory's trichrome (MT), and evaluated using three approaches: (1) conventional histomorphometric analysis (HE images) using a 144-point grid to quantify the bone matrix; (2) a semi-automatic method based on bone matrix segmentation to assess the bone matrix percentage (MT images); and (3) automatic approach, with the creation of a plug-in for ImageJ software. The time required to perform the analysis in each method was measured and subjected to Bland-Altman statistical analysis. All three methods were satisfactory for measuring bone formation and were not statistically different. The automatic approach reduced the working time compared to visual grid and semi-automated method (p < .01). Although histological evaluation of bone healing was performed successfully using all three methods, the novel automatic approach significantly shortened the time required for analysis and had high accuracy.
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Affiliation(s)
| | - Gustavo Davi Rabelo
- Dentistry Department, Federal University of Santa Catarina, Florianópolis, Santa Catarina, Brazil
| | | | | | | | - Paula Dechichi
- Department of Cell Biology, Histology and Embryology, Biomedical Science Institute, Federal University of Uberlândia, Uberlândia, Minas Gerais, Brazil
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5
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Zhang C, Zhang D, Wang H, Lin Q, Li M, Yuan J, Gao G, Dong J. Hyperbaric oxygen treatment improves pancreatic β‑cell function and hepatic gluconeogenesis in STZ‑induced type‑2 diabetes mellitus model mice. Mol Med Rep 2022; 25:90. [PMID: 35039874 PMCID: PMC8809048 DOI: 10.3892/mmr.2022.12606] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/06/2021] [Accepted: 10/14/2021] [Indexed: 12/14/2022] Open
Abstract
Type‑2 diabetes mellitus (T2DM) causes several complications that affect the quality of life and life span of patients. Hyperbaric oxygen therapy (HBOT) has been used to successfully treat several diseases, including carbon monoxide poisoning, ischemia, infections and diabetic foot ulcer, and increases insulin sensitivity in T2DM. The present study aimed to determine the effect of HBOT on β‑cell function and hepatic gluconeogenesis in streptozotocin (STZ)‑induced type‑2 diabetic mice. To establish a T2DM model, 7‑week‑old male C57BL/6J mice were fed a high‑fat diet (HFD) and injected once daily with low‑dose STZ for 3 days after 1‑week HFD feeding. At the 14th week, HFD+HBOT and T2DM+HBOT groups received 1‑h HBOT (2 ATA; 100% pure O2) daily from 5:00 to 6:00 p.m. for 7 days. The HFD and T2DM groups were maintained under normobaric oxygen conditions and used as controls. During HBOT, the 12‑h nocturnal food intake and body weight were measured daily. Moreover, blood glucose was measured by using a tail vein prick and a glucometer. After the final HBO treatment, all mice were sacrificed to conduct molecular biology experiments. Fasting insulin levels of blood samples of sacrificed mice were measured by an ultrasensitive ELISA kit. Pancreas and liver tissues were stained with hematoxylin and eosin, while immunohistochemistry was performed to determine the effects of HBOT on insulin resistance. TUNEL was used to determine the effects of HBOT on β‑cell apoptosis, and immunoblotting was conducted to determine the β‑cell apoptosis pathway. HBOT notably reduced fasting blood glucose and improved insulin sensitivity in T2DM mice. After HBOT, β‑cell area and β‑cell mass in T2DM mice were significantly increased. HBOT significantly decreased the β‑cell apoptotic rate in T2DM mice via the pancreatic Bcl‑2/caspase‑3/poly(ADP‑ribose) polymerase (PARP) apoptosis pathway. Moreover, HBOT improved the morphology of the liver tissue and increased hepatic glycogen storage in T2DM mice. These findings suggested that HBOT ameliorated the insulin sensitivity of T2DM mice by decreasing the β‑cell apoptotic rate via the pancreatic Bcl‑2/caspase‑3/PARP apoptosis pathway.
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MESH Headings
- Animals
- Apoptosis/physiology
- Blood Glucose/metabolism
- Blotting, Western
- Diabetes Mellitus, Experimental/blood
- Diabetes Mellitus, Experimental/etiology
- Diabetes Mellitus, Experimental/metabolism
- Diabetes Mellitus, Type 2/blood
- Diabetes Mellitus, Type 2/etiology
- Diabetes Mellitus, Type 2/metabolism
- Diet, High-Fat/adverse effects
- Disease Models, Animal
- Fasting/blood
- Gluconeogenesis/physiology
- Glucose Tolerance Test/methods
- Humans
- Hyperbaric Oxygenation/methods
- Insulin/blood
- Insulin-Secreting Cells/cytology
- Insulin-Secreting Cells/metabolism
- Liver/metabolism
- Male
- Mice, Inbred C57BL
- Mice
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Affiliation(s)
- Caishun Zhang
- Special Medicine Department, College of Basic Medicine, Qingdao University, Qingdao, Shandong 266071, P.R. China
| | - Di Zhang
- Shandong Provincial Engineering Laboratory of Novel Pharmaceutical Excipients, Sustained and Controlled Release Preparations, College of Medicine and Nursing, Dezhou University, Dezhou, Shandong 253023, P.R. China
| | - Haidan Wang
- Special Medicine Department, College of Basic Medicine, Qingdao University, Qingdao, Shandong 266071, P.R. China
| | - Qian Lin
- Special Medicine Department, College of Basic Medicine, Qingdao University, Qingdao, Shandong 266071, P.R. China
| | - Manwen Li
- Special Medicine Department, College of Basic Medicine, Qingdao University, Qingdao, Shandong 266071, P.R. China
| | - Junhua Yuan
- Special Medicine Department, College of Basic Medicine, Qingdao University, Qingdao, Shandong 266071, P.R. China
| | - Guangkai Gao
- Special Medicine Department, College of Basic Medicine, Qingdao University, Qingdao, Shandong 266071, P.R. China
- Department of Hyperbaric Medicine, No. 971 Hospital of Chinese People's Liberation Army, Qingdao, Shandong 266071, P.R. China
| | - Jing Dong
- Special Medicine Department, College of Basic Medicine, Qingdao University, Qingdao, Shandong 266071, P.R. China
- Physiology Department, College of Basic Medicine, Qingdao University, Qingdao, Shandong 266071, P.R. China
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Sun XJ, Liu NF. Diabetic mellitus, vascular calcification and hypoxia: A complex and neglected tripartite relationship. Cell Signal 2021; 91:110219. [PMID: 34921978 DOI: 10.1016/j.cellsig.2021.110219] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/25/2021] [Revised: 12/11/2021] [Accepted: 12/11/2021] [Indexed: 11/15/2022]
Abstract
DM (diabetic mellitus) and its common vascular complications VC (vascular calcification), are increasingly harmful to human health. In recent years, the research on the relationship between DM and VC is also deepening. Hypoxia, as one of the pathogenic factors of many disease models, is also closely related to the occurrence of DM and VC. There are some studies on the role of hypoxia in the pathogenesis of DM and VC respectively, but no one has made an in-depth summary of the systematic connection between hypoxia, DM and VC. Therefore, what we want to review in this article are the relationship between DM, VC and hypoxia, respectively, as well as the role of hypoxia in the development of DM and VC, which has little concern but is a novel and potentially target that may provide some new ideas for the prevention and treatment of DM, VC, especially diabetic VC.
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Affiliation(s)
- Xue-Jiao Sun
- Department of Cardiology, Zhongda Hospital, School of Medicine, Southeast University, 87 Dingjiaqiao, Nanjing 210009, PR China
| | - Nai-Feng Liu
- Department of Cardiology, Zhongda Hospital, School of Medicine, Southeast University, 87 Dingjiaqiao, Nanjing 210009, PR China.
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Abstract
Background: Hyperbaric oxygen treatment (HBOT) has been demonstrated to influence the keloid recurrence rate after surgery and to relieve keloid symptoms and other pathological processes in keloids. To explore the mechanism of the effect of HBOT on keloids, tumor immune gene expression and immune cell infiltration were studied in this work. Methods: From February 2021 to April 2021, HBOT was carried out on keloid patients four times before surgery. Keloid tissue samples were collected and divided into an HBOT group (keloid with HBOT before surgery [HK] group, n = 6) and a non-HBOT group (K group, n = 6). Tumor gene expression was analyzed with an Oncomine Immune Response Research Assay kit. Data were mined with R package. The differentially expressed genes between the groups were compared. Hub genes between the groups were determined and verified with Quantitative Real-time PCR. Immune cell infiltration was analyzed based on CIBERSORT deconvolution algorithm analysis of gene expression and verified with immunohistochemistry (IHC). Results: Inflammatory cell infiltration was reduced in the HK group. There were 178 upregulated genes and 217 downregulated genes. Ten hub genes were identified, including Integrin Subunit Alpha M (ITGAM), interleukin (IL)-4, IL-6, IL-2, Protein Tyrosine Phosphatase Receptor Type C (PTPRC), CD86, transforming growth factor (TGF), CD80, CTLA4, and IL-10. CD80, ITGAM, IL-4, and PTPRC with significantly downregulated expression were identified. IL-10 and IL-2 were upregulated in the HK group but without a significant difference. Infiltration differences of CD8 lymphocyte T cells, CD4 lymphocyte T-activated memory cells, and dendritic resting cells were identified with gene CIBERSORT deconvolution algorithm analysis. Infiltration levels of CD4 lymphocyte T cell in the HK group were significantly higher than those of the K group in IHC verification. Conclusion: HBOT affected tumor gene expression and immune cell infiltration in keloids. CD4 lymphocyte T cell, especially activated memory CD4+T, might be the key regulatory immune cell, and its related gene expression needs further study.
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8
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Effects of Hyperbaric Oxygen Therapy in Children with Severe Atopic Dermatitis. J Clin Med 2021; 10:jcm10061157. [PMID: 33802050 PMCID: PMC8001365 DOI: 10.3390/jcm10061157] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/31/2020] [Revised: 03/06/2021] [Accepted: 03/07/2021] [Indexed: 11/18/2022] Open
Abstract
In the course of atopic dermatitis (AD), the overactivity of the immune system, associated with predominant Th2 lymphocyte responses, is observed, which leads to an increased inflammatory reaction. Cases of a severe course of atopic dermatitis lead to the search for new therapeutic options. The aim of this study was to assess the effects of hyperbaric oxygen therapy (HBOT) treatment for severe cases of AD in children. A total of 15 children with severe AD underwent therapy. The influence of HBOT on the clinical course of AD and immunomodulatory effect of the therapy was analyzed by the SCORAD and objective SCORAD (oSCORAD) scales and by determining the serum concentration of immunological parameters (blood: nTreg lymphocytes, CD4+CD25highCD127-FOXP3+, NKT lymphocytes CD3+, CD16/56+, and serum: total IgE, cytokines IL-4, IL-6, and IL-10, before and after the 30-day treatment cycle). The study showed a significant effect of the therapy on the improvement of the skin condition. In all children, a reduction in the extent and intensity of skin lesions, reduction of redness, swelling, oozing/crusting, scratch marks and skin lichenification after HBOT was observed. Patients also reported a reduction in the intensity of pruritus and an improvement in sleep quality after therapy. In all children, a statistically significant decrease in the serum level of IgE was observed. However, no statistically significant changes in the blood levels of IL-4, IL-6 and IL-10, as well as the percentage of CD4+CD25highCD127−FOXP3+ Treg and NKT lymphocytes, were found. In conclusion, the use of hyperbaric therapy has a positive impact on treatment results in children with a severe course of atopic dermatitis.
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Resanović I, Zarić B, Radovanović J, Sudar-Milovanović E, Gluvić Z, Jevremović D, Isenović ER. Hyperbaric Oxygen Therapy and Vascular Complications in Diabetes Mellitus. Angiology 2020; 71:876-885. [PMID: 32638622 DOI: 10.1177/0003319720936925] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
Vascular complications in patients with diabetes mellitus (DM) are common. Since impaired oxygen balance in plasma plays an important role in the pathogenesis of chronic DM-associated complications, the administration of hyperbaric oxygen therapy (HBOT) has been recommended to influence development of vascular complications. Hyperbaric oxygen therapy involves inhalation of 100% oxygen under elevated pressure from 1.6 to 2.8 absolute atmospheres in hyperbaric chambers. Hyperbaric oxygen therapy increases plasma oxygen solubility, contributing to better oxygen diffusion to distant tissues and preservation of the viability of tissues reversibly damaged by atherosclerosis-induced ischemia, along with microcirculation restoration. Hyperbaric oxygen therapy exerts antiatherogenic, antioxidant, and cardioprotective effects by altering the level and composition of plasma fatty acids and also by promoting signal transduction through membranes, which are impaired by hyperglycemia and hypoxia. In addition, HBOT affects molecules involved in the regulation of nitric oxide synthesis and in that way exerts anti-inflammatory and angiogenic effects in patients with DM. In this review, we explore the recent literature related to the effects of HBOT on DM-related vascular complications.
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Affiliation(s)
- Ivana Resanović
- Department of Radiobiology and Molecular Genetics, "VINČA" Institute of Nuclear Sciences - National Institute of the Republic of Serbia, University of Belgrade, Belgrade, Serbia
| | - Božidarka Zarić
- Department of Radiobiology and Molecular Genetics, "VINČA" Institute of Nuclear Sciences - National Institute of the Republic of Serbia, University of Belgrade, Belgrade, Serbia
| | - Jelena Radovanović
- Department of Radiobiology and Molecular Genetics, "VINČA" Institute of Nuclear Sciences - National Institute of the Republic of Serbia, University of Belgrade, Belgrade, Serbia
| | - Emina Sudar-Milovanović
- Department of Radiobiology and Molecular Genetics, "VINČA" Institute of Nuclear Sciences - National Institute of the Republic of Serbia, University of Belgrade, Belgrade, Serbia
| | - Zoran Gluvić
- Department of Endocrinology and Diabetes, Zemun Clinical Hospital, School of Medicine, University of Belgrade, Serbia
| | - Danimir Jevremović
- Faculty of Stomatology in Pancevo, University Business Academy, Novi Sad, Serbia
| | - Esma R Isenović
- Department of Radiobiology and Molecular Genetics, "VINČA" Institute of Nuclear Sciences - National Institute of the Republic of Serbia, University of Belgrade, Belgrade, Serbia
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Ward NC, Lui JB, Hernandez R, Yu L, Struthers M, Xie J, Santos Savio A, Dwyer CJ, Hsiung S, Yu A, Malek TR. Persistent IL-2 Receptor Signaling by IL-2/CD25 Fusion Protein Controls Diabetes in NOD Mice by Multiple Mechanisms. Diabetes 2020; 69:2400-2413. [PMID: 32843568 PMCID: PMC7576568 DOI: 10.2337/db20-0186] [Citation(s) in RCA: 19] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/21/2020] [Accepted: 08/21/2020] [Indexed: 10/23/2022]
Abstract
Low-dose interleukin-2 (IL-2) represents a new therapeutic approach to regulate immune homeostasis to promote immune tolerance in patients with autoimmune diseases, including type 1 diabetes. We have developed a new IL-2-based biologic, an IL-2/CD25 fusion protein, with greatly improved pharmacokinetics and pharmacodynamics when compared with recombinant IL-2 to enhance this type of immunotherapy. In this study, we show that low-dose mouse IL-2/CD25 (mIL-2/CD25), but not an equivalent amount of IL-2, prevents the onset of diabetes in NOD mice and controls diabetes in hyperglycemic mice. mIL-2/CD25 acts not only to expand regulatory T cells (Tregs) but also to increase their activation and migration into lymphoid tissues and the pancreas. Lower incidence of diabetes is associated with increased serum levels of IL-10, a cytokine readily produced by activated Tregs. These effects likely act in concert to lower islet inflammation while increasing Tregs in the remaining inflamed islets. mIL-2/CD25 treatment is also associated with lower anti-insulin autoantibody levels in part by inhibition of T follicular helper cells. Thus, long-acting mIL-2/CD25 represents an improved IL-2 analog that persistently elevates Tregs to maintain a favorable Treg/effector T cell ratio that limits diabetes by expansion of activated Tregs that readily migrate into lymphoid tissues and the pancreas while inhibiting autoantibodies.
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Affiliation(s)
- Natasha C Ward
- Department of Microbiology and Immunology, Miller School of Medicine, University of Miami, Miami, FL
| | - Jen Bon Lui
- Department of Microbiology and Immunology, Miller School of Medicine, University of Miami, Miami, FL
| | - Rosmely Hernandez
- Department of Microbiology and Immunology, Miller School of Medicine, University of Miami, Miami, FL
| | - Liping Yu
- Barbara Davis Center for Childhood Diabetes, University of Colorado School of Medicine, Aurora, CO
| | - Mary Struthers
- Immunology Discovery, Bristol-Myers Squibb, Princeton, NJ
| | - Jenny Xie
- Immunology Discovery, Bristol-Myers Squibb, Princeton, NJ
| | - Alicia Santos Savio
- Department of Microbiology and Immunology, Miller School of Medicine, University of Miami, Miami, FL
| | - Connor J Dwyer
- Department of Microbiology and Immunology, Miller School of Medicine, University of Miami, Miami, FL
| | - Sunnie Hsiung
- Department of Microbiology and Immunology, Miller School of Medicine, University of Miami, Miami, FL
| | - Aixin Yu
- Department of Microbiology and Immunology, Miller School of Medicine, University of Miami, Miami, FL
| | - Thomas R Malek
- Department of Microbiology and Immunology, Miller School of Medicine, University of Miami, Miami, FL
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11
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Song L, Yuan J, Liu Y, Zhang D, Zhang C, Lin Q, Li M, Su K, Li Y, Gao G, Ma R, Dong J. Ghrelin system is involved in improvements in glucose metabolism mediated by hyperbaric oxygen treatment in a streptozotocin‑induced type 1 diabetes mouse model. Mol Med Rep 2020; 22:3767-3776. [PMID: 32901885 PMCID: PMC7533472 DOI: 10.3892/mmr.2020.11481] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/23/2020] [Accepted: 07/28/2020] [Indexed: 12/17/2022] Open
Abstract
Type 1 diabetes mellitus (T1DM) is an autoimmune disorder for which the only effective therapy is insulin replacement. Hyperbaric oxygen (HBO) therapy has demonstrated potential in improving hyperglycemia and as a treatment option for T1DM. Ghrelin and HBO have been previously reported to exert proliferative, anti-apoptotic and anti-inflammatory effects in pancreatic cells. The present study investigated the mechanism underlying HBO- and ghrelin system-mediated regulation of glucose metabolism. Male C57BL/6 mice were intraperitoneally injected with streptozotocin (STZ; 150 mg/kg) to induce T1DM before the diabetic mice were randomly assigned into the T1DM and T1DM + HBO groups. Mice in the T1DM + HBO group received HBO (1 h; 100% oxygen; 2 atmospheres absolute) daily for 2 weeks. Significantly lower blood glucose levels and food intake were observed in mice in the T1DM + HBO group. Following HBO treatment, islet β-cell area were increased whereas those of α-cell were decreased in the pancreas. In addition, greater hepatic glycogen storage in liver was observed, which coincided with higher pancreatic glucose transporter 2 (GLUT2) expression levels and reduced hepatic GLUT2 membrane trafficking. There were also substantially higher total plasma ghrelin concentrations and gastric ghrelin-O-acyl transferase (GOAT) expression levels in mice in the T1DM + HBO group. HBO treatment also abolished reductions in pancreatic GOAT expression levels in T1DM mice. Additionally, hepatic growth hormone secretagogue receptor-1a levels were found to be lower in mice in the T1DM + HBO group compared with those in the T1DM group. These results suggest that HBO administration improved glucose metabolism in a STZ-induced T1DM mouse model. The underlying mechanism involves improved insulin-release, glucose-sensing and regulation of hepatic glycogen storage, an observation that was also likely dependent on the ghrelin signalling system.
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Affiliation(s)
- Limin Song
- Department of Special Medicine, Medical College, Qingdao University, Qingdao, Shandong 266071, P.R. China
| | - Junhua Yuan
- Department of Special Medicine, Medical College, Qingdao University, Qingdao, Shandong 266071, P.R. China
| | - Yuan Liu
- Department of Special Medicine, Medical College, Qingdao University, Qingdao, Shandong 266071, P.R. China
| | - Di Zhang
- Department of Special Medicine, Medical College, Qingdao University, Qingdao, Shandong 266071, P.R. China
| | - Caishun Zhang
- Department of Special Medicine, Medical College, Qingdao University, Qingdao, Shandong 266071, P.R. China
| | - Qian Lin
- Department of Special Medicine, Medical College, Qingdao University, Qingdao, Shandong 266071, P.R. China
| | - Manwen Li
- Department of Special Medicine, Medical College, Qingdao University, Qingdao, Shandong 266071, P.R. China
| | - Kaizhen Su
- Department of Clinical Medicine, Medical College, Qingdao University, Qingdao, Shandong 266071, P.R. China
| | - Yanrun Li
- Department of Clinical Medicine, Medical College, Qingdao University, Qingdao, Shandong 266071, P.R. China
| | - Guangkai Gao
- Department of Hyperbaric Medicine, Hospital of Chinese People's Liberation Army, Qingdao, Shandong 266072, P.R. China
| | - Ruixia Ma
- Department of Nephrology, Affiliated Hospital of Qingdao University, Qingdao, Shandong 266005, P.R. China
| | - Jing Dong
- Department of Special Medicine, Medical College, Qingdao University, Qingdao, Shandong 266071, P.R. China
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12
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Resanović I, Gluvić Z, Zarić B, Sudar-Milovanović E, Vučić V, Arsić A, Nedić O, Šunderić M, Gligorijević N, Milačić D, Isenović ER. Effect of Hyperbaric Oxygen Therapy on Fatty Acid Composition and Insulin-like Growth Factor Binding Protein 1 in Adult Type 1 Diabetes Mellitus Patients: A Pilot Study. Can J Diabetes 2020; 44:22-29. [PMID: 31311728 DOI: 10.1016/j.jcjd.2019.04.018] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/17/2019] [Revised: 03/05/2019] [Accepted: 04/30/2019] [Indexed: 02/08/2023]
Abstract
OBJECTIVE Metabolic changes in type 1 diabetes mellitus (T1DM) impair vasodilation, and this leads to tissue hypoxia and microvascular pathology. Hyperbaric oxygen therapy (HBOT) can significantly improve the outcome of ischemic conditions in T1DM patients and reduce vascular complications. The aim of our study was to assess the effects of HBOT on plasma fatty acid (FA) composition, and expression of insulin-like growth factor binding protein 1 (IGFBP-1) in T1DM patients. METHODS Our study included 24 adult T1DM patients diagnosed with peripheral vascular complications. The patients were exposed to 10 sessions of 100% oxygen inhalation at 2.4 atmosphere absolute for 1 hour. Blood samples were collected at admission and after HBOT for measurement of metabolic parameters, FA composition and IGFBP-1. Measurement of plasma FA composition was determined by gas chromatography. Expression of IGFBP-1 in the serum was estimated by Western blot analysis. RESULTS HBOT decreased blood levels of total cholesterol (p<0.05), triglycerides (p<0.05) and low-density lipoprotein (p<0.05). HBOT increased plasma levels of individual FAs: palmitic acid (p<0.05), palmitoleic acid (p<0.05), docosapentaenoic acid (p<0.05) and docosahexaenoic acid (p<0.01), and decreased levels of stearic acid (p<0.05), alpha linolenic acid (p<0.05) and linoleic acid (p<0.01). Expression of IGFBP-1 (p<0.01) was increased, whereas the level of insulin (p<0.001) was decreased in the serum after HBOT. CONCLUSIONS Our results indicate that HBOT exerts beneficial effects in T1DM patients by improving the lipid profile and altering FA composition.
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Affiliation(s)
- Ivana Resanović
- Institute of Nuclear Sciences Vinča, Laboratory of Radiobiology and Molecular Genetics, University of Belgrade, Belgrade, Serbia.
| | - Zoran Gluvić
- Clinic for Internal Medicine, Zemun Clinical Hospital, School of Medicine, University of Belgrade, Belgrade, Serbia
| | - Božidarka Zarić
- Institute of Nuclear Sciences Vinča, Laboratory of Radiobiology and Molecular Genetics, University of Belgrade, Belgrade, Serbia
| | - Emina Sudar-Milovanović
- Institute of Nuclear Sciences Vinča, Laboratory of Radiobiology and Molecular Genetics, University of Belgrade, Belgrade, Serbia
| | - Vesna Vučić
- Centre of Research Excellence in Nutrition and Metabolism, Institute for Medical Research, University of Belgrade, Belgrade, Serbia
| | - Aleksandra Arsić
- Centre of Research Excellence in Nutrition and Metabolism, Institute for Medical Research, University of Belgrade, Belgrade, Serbia
| | - Olgica Nedić
- Department for Metabolism, Institute for the Application of Nuclear Energy, University of Belgrade, Belgrade, Serbia
| | - Miloš Šunderić
- Department for Metabolism, Institute for the Application of Nuclear Energy, University of Belgrade, Belgrade, Serbia
| | - Nikola Gligorijević
- Department for Metabolism, Institute for the Application of Nuclear Energy, University of Belgrade, Belgrade, Serbia
| | - Davorka Milačić
- Department of Hyperbaric Medicine, Zemun Clinical Hospital, Belgrade, Serbia
| | - Esma R Isenović
- Institute of Nuclear Sciences Vinča, Laboratory of Radiobiology and Molecular Genetics, University of Belgrade, Belgrade, Serbia; Faculty of Stomatology, Pančevo, University Business Academy, Novi Sad, Serbia.
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13
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Yuan J, Jiang Q, Song L, Liu Y, Li M, Lin Q, Li Y, Su K, Ma Z, Wang Y, Liu D, Dong J. L-Carnitine Is Involved in Hyperbaric Oxygen-Mediated Therapeutic Effects in High Fat Diet-Induced Lipid Metabolism Dysfunction. Molecules 2020; 25:molecules25010176. [PMID: 31906305 PMCID: PMC6982999 DOI: 10.3390/molecules25010176] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/19/2019] [Revised: 12/14/2019] [Accepted: 12/25/2019] [Indexed: 11/16/2022] Open
Abstract
Lipid metabolism dysfunction and obesity are serious health issues to human beings. The current study investigated the effects of hyperbaric oxygen (HBO) against high fat diet (HFD)-induced lipid metabolism dysfunction and the roles of L-carnitine. C57/B6 mice were fed with HFD or normal chew diet, with or without HBO treatment. Histopathological methods were used to assess the adipose tissues, serum free fatty acid (FFA) levels were assessed with enzymatic methods, and the endogenous circulation and skeletal muscle L-carnitine levels were assessed with liquid chromatography-tandem mass spectrometry (LC-MS/MS). Additionally, western blotting was used to assess the expression levels of PPARα, CPT1b, pHSL/HSL, and UCP1. HFD treatment increased body/adipose tissue weight, serum FFA levels, circulation L-carnitines and decreased skeletal muscle L-carnitine levels, while HBO treatment alleviated such changes. Moreover, HFD treatment increased fatty acid deposition in adipose tissues and decreased the expression of HSL, while HBO treatment alleviated such changes. Additionally, HFD treatment decreased the expression levels of PPARα and increased those of CPT1b in skeletal muscle, while HBO treatment effectively reverted such changes as well. In brown adipose tissues, HFD increased the expression of UCP1 and the phosphorylation of HSL, which was abolished by HBO treatment as well. In summary, HBO treatment may alleviate HFD-induced fatty acid metabolism dysfunction in C57/B6 mice, which seems to be associated with circulation and skeletal muscle L-carnitine levels and PPARα expression.
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Affiliation(s)
- Junhua Yuan
- Department of Specialty Medicine, School of Basic Medicine, Qingdao University, Qingdao 266071, China; (J.Y.); (L.S.); (Y.L.); (M.L.); (Q.L.)
| | - Qixiao Jiang
- Department of Toxicology, School of Public Health, Qingdao University, Qingdao 266071, China
- Correspondence: (Q.J.); (J.D.); Tel.: +86-18300267138 (Q.J.); +86-0532-83780035 (J.D.)
| | - Limin Song
- Department of Specialty Medicine, School of Basic Medicine, Qingdao University, Qingdao 266071, China; (J.Y.); (L.S.); (Y.L.); (M.L.); (Q.L.)
| | - Yuan Liu
- Department of Specialty Medicine, School of Basic Medicine, Qingdao University, Qingdao 266071, China; (J.Y.); (L.S.); (Y.L.); (M.L.); (Q.L.)
| | - Manwen Li
- Department of Specialty Medicine, School of Basic Medicine, Qingdao University, Qingdao 266071, China; (J.Y.); (L.S.); (Y.L.); (M.L.); (Q.L.)
| | - Qian Lin
- Department of Specialty Medicine, School of Basic Medicine, Qingdao University, Qingdao 266071, China; (J.Y.); (L.S.); (Y.L.); (M.L.); (Q.L.)
| | - Yanrun Li
- Department of Clinical Medicine, Medical Collage, Qingdao University, Qingdao 266071, China; (Y.L.); (K.S.); (Z.M.); (Y.W.); (D.L.)
| | - Kaizhen Su
- Department of Clinical Medicine, Medical Collage, Qingdao University, Qingdao 266071, China; (Y.L.); (K.S.); (Z.M.); (Y.W.); (D.L.)
| | - Zhengye Ma
- Department of Clinical Medicine, Medical Collage, Qingdao University, Qingdao 266071, China; (Y.L.); (K.S.); (Z.M.); (Y.W.); (D.L.)
| | - Yifei Wang
- Department of Clinical Medicine, Medical Collage, Qingdao University, Qingdao 266071, China; (Y.L.); (K.S.); (Z.M.); (Y.W.); (D.L.)
| | - Defeng Liu
- Department of Clinical Medicine, Medical Collage, Qingdao University, Qingdao 266071, China; (Y.L.); (K.S.); (Z.M.); (Y.W.); (D.L.)
| | - Jing Dong
- Department of Specialty Medicine, School of Basic Medicine, Qingdao University, Qingdao 266071, China; (J.Y.); (L.S.); (Y.L.); (M.L.); (Q.L.)
- Department of Physiology, School of Basic Medicine, Qingdao University, Qingdao 266071, China
- Correspondence: (Q.J.); (J.D.); Tel.: +86-18300267138 (Q.J.); +86-0532-83780035 (J.D.)
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14
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Estrada EJ, Decima JL, Bortman G, Roberti J, Romero EB, Samaja G, Saavedra AR, Martínez G, Gutiérrez S. Combination treatment of autologous bone marrow stem cell transplantation and hyperbaric oxygen therapy for type 2 diabetes mellitus: A randomized controlled trial. Cell Transplant 2019; 28:1632-1640. [PMID: 31665912 PMCID: PMC6923554 DOI: 10.1177/0963689719883813] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2019] [Revised: 09/17/2019] [Accepted: 09/30/2019] [Indexed: 01/06/2023] Open
Abstract
The objective of this study was to compare standard treatment versus the combination of intrapancreatic autologous stem cell (ASC) infusion and hyperbaric oxygen treatment (HBOT) before and after ASC in the metabolic control of patients with type 2 diabetes mellitus (T2DM). This study was a prospective, randomized controlled trial. The combined intervention consisted of 10 sessions of HBOT before the intrapancreatic infusion of ASC and 10 sessions afterwards. ASCs were infused into the main arterial supply of the pancreas to maximize the presence of the stem cells where the therapeutic effect is most desired. A total of 23 patients were included (control group = 10, intervention group = 13). Age, gender, diabetes duration, number of medications taken, body weight and height, and insulin requirements were recorded at baseline and every three months. Also, body mass index, fasting plasma glucose, C-peptide, and HbA1c, C-peptide/glucose ratio (CPGR) were measured every three months for one year. HbA1c was significantly lower in the intervention group compared with control throughout follow-up. Overall, 77% of patients in the intervention group and 30% of patients in the control group demonstrated a decrease of HbA1c at 180 days (compared with baseline) of at least 1 unit. Glucose levels were significantly lower in the intervention group at all timepoints during follow-up. C-peptide levels were significantly higher in the intervention group during follow-up and at one year: 1.9 ± 1.0 ng/mL versus 0.7 ± 0.4 ng/mL in intervention versus control groups, respectively, p = 0.0021. CPGR was higher in the intervention group at all controls during follow-up. The requirement for insulin was significantly lower in the intervention group at 90, 180, 270, and 365 days. Combined therapy of intrapancreatic ASC infusion and HBOT showed increased metabolic control and reduced insulin requirements in patients with T2DM compared with standard treatment.
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Affiliation(s)
- Esteban J. Estrada
- Hospital de Alta Complejidad Pte. Juan Domingo Perón, Formosa,
Argentina
| | - José Luis Decima
- Hospital de Alta Complejidad Pte. Juan Domingo Perón, Formosa,
Argentina
| | - Guillermo Bortman
- Hospital de Alta Complejidad Pte. Juan Domingo Perón, Formosa,
Argentina
| | - Javier Roberti
- Hospital de Alta Complejidad Pte. Juan Domingo Perón, Formosa,
Argentina
| | | | - Gustavo Samaja
- Hospital de Alta Complejidad Pte. Juan Domingo Perón, Formosa,
Argentina
| | | | - Gerardo Martínez
- Hospital de Alta Complejidad Pte. Juan Domingo Perón, Formosa,
Argentina
| | - Samuel Gutiérrez
- Hospital de Alta Complejidad Pte. Juan Domingo Perón, Formosa,
Argentina
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15
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Benkő R, Miklós Z, Ágoston VA, Ihonvien K, Répás C, Csépányi-Kömi R, Kerék M, Béres NJ, Horváth EM. Hyperbaric Oxygen Therapy Dampens Inflammatory Cytokine Production and Does Not Worsen the Cardiac Function and Oxidative State of Diabetic Rats. Antioxidants (Basel) 2019; 8:antiox8120607. [PMID: 31801203 PMCID: PMC6943561 DOI: 10.3390/antiox8120607] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/12/2019] [Revised: 11/26/2019] [Accepted: 11/27/2019] [Indexed: 01/17/2023] Open
Abstract
Hyperbaric oxygen therapy (HBOT) is frequently used after soft tissue injuries and in diabetic patients with ulcerated wounds; however, its ability to increase oxidative stress casts doubts. Diabetes (DM) in male Wistar rats (N = 20) weighing 300 g were induced by a single dose of streptozotocin. Ten diabetics (DMHBOT) and 10 controls (CHBOT) underwent a one-hour long hyperbaric oxygen treatment protocol (2.5 bar) 12 times after the 3rd week of diabetes. Ten animals remained untreated. Eight weeks after diabetes induction, we measured the 24-hour blood glucose profile and cardiovascular function (sonocardiography and the relaxation ability of aortae). Malonyl-dialdehyde (MDA) and cytokine levels were measured in blood plasma. Poly(ADP-ribose) polymerase (PARP) activity was estimated in cardiac and aortic tissue. HBOT did not alter most of the cardiovascular parameters. PARylation in cardiac and aortic tissues, plasma MDA levels were elevated in diabetic rats. HBOT prevented the increase of MDA in diabetic animals. In addition, levels of the pro-inflammatory cytokine-induced neutrophil chemoattractant-1 (CINC-1) the levels of anti-inflammatory tissue inhibitor of metalloproteases-1 were not altered in diabetes or in hyperoxia. Our results suggest that HBOT does not increase long-term oxidative stress, and, similar to training, the TBARS products, nitrotyrosine formation and poly(ADP-ribosyl)ation may be eased as a result of hyperoxia.
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Affiliation(s)
- Rita Benkő
- Department of Physiology, Semmelweis University, Budapest 1094, Hungary; (R.C.-K.); (E.M.H.)
- Corresponding: ; Tel.: +36-1-459-1500/60338; Fax: +36-1-266-7480
| | - Zsuzsanna Miklós
- Institute of Clinical Experimental Research, Semmelweis University, Budapest 1094, Hungary; (Z.M.); (K.I.); (C.R.); (M.K.)
| | - Viktor Antal Ágoston
- Clinical Toxicology and Emergency Department, Peterfy Hospital, Budapest 1076, Hungary;
| | - Katrine Ihonvien
- Institute of Clinical Experimental Research, Semmelweis University, Budapest 1094, Hungary; (Z.M.); (K.I.); (C.R.); (M.K.)
| | - Csaba Répás
- Institute of Clinical Experimental Research, Semmelweis University, Budapest 1094, Hungary; (Z.M.); (K.I.); (C.R.); (M.K.)
| | - Roland Csépányi-Kömi
- Department of Physiology, Semmelweis University, Budapest 1094, Hungary; (R.C.-K.); (E.M.H.)
| | - Margit Kerék
- Institute of Clinical Experimental Research, Semmelweis University, Budapest 1094, Hungary; (Z.M.); (K.I.); (C.R.); (M.K.)
| | - Nóra Judit Béres
- Department of Pediatrics, Semmelweis University, Budapest 1083, Hungary;
| | - Eszter Mária Horváth
- Department of Physiology, Semmelweis University, Budapest 1094, Hungary; (R.C.-K.); (E.M.H.)
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16
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Abdulreda MH, Molano RD, Faleo G, Lopez-Cabezas M, Shishido A, Ulissi U, Fotino C, Hernandez LF, Tschiggfrie A, Aldrich VR, Tamayo-Garcia A, Bayer AS, Ricordi C, Caicedo A, Buchwald P, Pileggi A, Berggren PO. In vivo imaging of type 1 diabetes immunopathology using eye-transplanted islets in NOD mice. Diabetologia 2019; 62:1237-1250. [PMID: 31087105 PMCID: PMC6561836 DOI: 10.1007/s00125-019-4879-0] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/14/2019] [Accepted: 03/22/2019] [Indexed: 12/31/2022]
Abstract
AIMS/HYPOTHESIS Autoimmune attack against the insulin-producing beta cells in the pancreatic islets results in type 1 diabetes. However, despite considerable research, details of the type 1 diabetes immunopathology in situ are not fully understood mainly because of difficult access to the pancreatic islets in vivo. METHODS Here, we used direct non-invasive confocal imaging of islets transplanted in the anterior chamber of the eye (ACE) to investigate the anti-islet autoimmunity in NOD mice before, during and after diabetes onset. ACE-transplanted islets allowed longitudinal studies of the autoimmune attack against islets and revealed the infiltration kinetics and in situ motility dynamics of fluorescence-labelled autoreactive T cells during diabetes development. Ex vivo immunostaining was also used to compare immune cell infiltrations into islet grafts in the eye and kidney as well as in pancreatic islets of the same diabetic NOD mice. RESULTS We found similar immune infiltration in native pancreatic and ACE-transplanted islets, which established the ACE-transplanted islets as reliable reporters of the autoimmune response. Longitudinal studies in ACE-transplanted islets identified in vivo hallmarks of islet inflammation that concurred with early immune infiltration of the islets and preceded their collapse and hyperglycaemia onset. A model incorporating data on ACE-transplanted islet degranulation and swelling allowed early prediction of the autoimmune attack in the pancreas and prompted treatments to intercept type 1 diabetes. CONCLUSIONS/INTERPRETATION The current findings highlight the value of ACE-transplanted islets in studying early type 1 diabetes pathogenesis in vivo and underscore the need for timely intervention to halt disease progression.
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Affiliation(s)
- Midhat H Abdulreda
- Diabetes Research Institute and Cell Transplant Center, University of Miami Miller School of Medicine, 1450 NW 10th Ave, Miami, FL, 33136, USA.
- Department of Surgery, University of Miami Miller School of Medicine, Miami, FL, USA.
- Department of Microbiology and Immunology, University of Miami Miller School of Medicine, Miami, FL, USA.
- Department of Ophthalmology, University of Miami Miller School of Medicine, Miami, FL, USA.
| | - R Damaris Molano
- Diabetes Research Institute and Cell Transplant Center, University of Miami Miller School of Medicine, 1450 NW 10th Ave, Miami, FL, 33136, USA
| | - Gaetano Faleo
- Diabetes Research Institute and Cell Transplant Center, University of Miami Miller School of Medicine, 1450 NW 10th Ave, Miami, FL, 33136, USA
| | - Maite Lopez-Cabezas
- Diabetes Research Institute and Cell Transplant Center, University of Miami Miller School of Medicine, 1450 NW 10th Ave, Miami, FL, 33136, USA
| | - Alexander Shishido
- Diabetes Research Institute and Cell Transplant Center, University of Miami Miller School of Medicine, 1450 NW 10th Ave, Miami, FL, 33136, USA
| | - Ulisse Ulissi
- Diabetes Research Institute and Cell Transplant Center, University of Miami Miller School of Medicine, 1450 NW 10th Ave, Miami, FL, 33136, USA
| | - Carmen Fotino
- Diabetes Research Institute and Cell Transplant Center, University of Miami Miller School of Medicine, 1450 NW 10th Ave, Miami, FL, 33136, USA
| | - Luis F Hernandez
- Diabetes Research Institute and Cell Transplant Center, University of Miami Miller School of Medicine, 1450 NW 10th Ave, Miami, FL, 33136, USA
| | - Ashley Tschiggfrie
- Diabetes Research Institute and Cell Transplant Center, University of Miami Miller School of Medicine, 1450 NW 10th Ave, Miami, FL, 33136, USA
| | - Virginia R Aldrich
- Diabetes Research Institute and Cell Transplant Center, University of Miami Miller School of Medicine, 1450 NW 10th Ave, Miami, FL, 33136, USA
| | - Alejandro Tamayo-Garcia
- Diabetes Research Institute and Cell Transplant Center, University of Miami Miller School of Medicine, 1450 NW 10th Ave, Miami, FL, 33136, USA
- Department of Medicine, University of Miami Miller School of Medicine, Miami, FL, USA
| | - Allison S Bayer
- Diabetes Research Institute and Cell Transplant Center, University of Miami Miller School of Medicine, 1450 NW 10th Ave, Miami, FL, 33136, USA
- Department of Microbiology and Immunology, University of Miami Miller School of Medicine, Miami, FL, USA
| | - Camillo Ricordi
- Diabetes Research Institute and Cell Transplant Center, University of Miami Miller School of Medicine, 1450 NW 10th Ave, Miami, FL, 33136, USA
- Department of Surgery, University of Miami Miller School of Medicine, Miami, FL, USA
- Department of Microbiology and Immunology, University of Miami Miller School of Medicine, Miami, FL, USA
- Department of Biomedical Engineering, University of Miami, Coral Gables, FL, USA
- Diabetes Research Institute Federation, Hollywood, FL, USA
| | - Alejandro Caicedo
- Department of Medicine, University of Miami Miller School of Medicine, Miami, FL, USA
| | - Peter Buchwald
- Diabetes Research Institute and Cell Transplant Center, University of Miami Miller School of Medicine, 1450 NW 10th Ave, Miami, FL, 33136, USA.
- Department of Molecular and Cellular Pharmacology, University of Miami Miller School of Medicine, Miami, FL, USA.
| | - Antonello Pileggi
- Diabetes Research Institute and Cell Transplant Center, University of Miami Miller School of Medicine, 1450 NW 10th Ave, Miami, FL, 33136, USA.
- Department of Surgery, University of Miami Miller School of Medicine, Miami, FL, USA.
- Department of Microbiology and Immunology, University of Miami Miller School of Medicine, Miami, FL, USA.
- Department of Biomedical Engineering, University of Miami, Coral Gables, FL, USA.
- Center for Scientific Review, National Institutes of Health, 6701 Rockledge Drive, Bethesda, MD, 20892, USA.
| | - Per-Olof Berggren
- Diabetes Research Institute and Cell Transplant Center, University of Miami Miller School of Medicine, 1450 NW 10th Ave, Miami, FL, 33136, USA.
- Department of Surgery, University of Miami Miller School of Medicine, Miami, FL, USA.
- Diabetes Research Institute Federation, Hollywood, FL, USA.
- The Rolf Luft Research Center for Diabetes and Endocrinology, Karolinska Institutet, Karolinska University Hospital L1, SE-17176, Stockholm, Sweden.
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17
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Koufakis T, Karras SN, Mustafa OG, Karangelis D, Zebekakis P, Kotsa K. Into the deep blue sea: A review of the safety of recreational diving in people with diabetes mellitus. Eur J Sport Sci 2019; 20:1-16. [PMID: 31013208 DOI: 10.1080/17461391.2019.1606286] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
Abstract
People with diabetes, particularly those being insulin treated, have been for many years considered ineligible for diving, because of the high risk of adverse events. Blood glucose levels tend to decline during diving, probably because of changes in insulin requirements and resistance, due to increased physical activity and effects of hyperbaric environment on glucose tolerance. Strict adherence to safety protocols, in conjunction with optimal physical status, lack of diabetic complications (especially impaired awareness of hypoglycaemia) and satisfactory baseline glycaemic control, seem to minimise the risk of complications during diving. The integration of modern technology into diabetes management, providing potential for underwater continuous glucose monitoring, can be useful in optimising metabolic control before, during and after diving. Despite the significant progress been made on safety issues, there is still a need to implement the relevant recommendations into divers' everyday practice. Existing evidence is mainly derived from small studies and there is a wide heterogeneity in terms of study designs and explored outcomes, rendering the extraction of definitive conclusions challenging. The aim of this review is to present and critically evaluate available evidence, use of technology, and gaps in existing knowledge that deserve further evaluation by future studies.
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Affiliation(s)
- Theocharis Koufakis
- Division of Endocrinology and Metabolism and Diabetes Center, First Department of Internal Medicine, Medical School, Aristotle University of Thessaloniki, AHEPA University Hospital, Thessaloniki, Greece
| | - Spyridon N Karras
- Division of Endocrinology and Metabolism and Diabetes Center, First Department of Internal Medicine, Medical School, Aristotle University of Thessaloniki, AHEPA University Hospital, Thessaloniki, Greece
| | - Omar G Mustafa
- Department of Diabetes, King's College Hospital, London, UK
| | - Dimos Karangelis
- Department of Cardiac Surgery, Athens Medical Center, Marousi, Greece
| | - Pantelis Zebekakis
- Division of Endocrinology and Metabolism and Diabetes Center, First Department of Internal Medicine, Medical School, Aristotle University of Thessaloniki, AHEPA University Hospital, Thessaloniki, Greece
| | - Kalliopi Kotsa
- Division of Endocrinology and Metabolism and Diabetes Center, First Department of Internal Medicine, Medical School, Aristotle University of Thessaloniki, AHEPA University Hospital, Thessaloniki, Greece
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18
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Dwyer CJ, Bayer AL, Fotino C, Yu L, Cabello-Kindelan C, Ward NC, Toomer KH, Chen Z, Malek TR. Altered homeostasis and development of regulatory T cell subsets represent an IL-2R-dependent risk for diabetes in NOD mice. Sci Signal 2017; 10:10/510/eaam9563. [PMID: 29259102 DOI: 10.1126/scisignal.aam9563] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
The cytokine interleukin-2 (IL-2) is critical for the functions of regulatory T cells (Tregs). The contribution of polymorphisms in the gene encoding the IL-2 receptor α subunit (IL2RA), which are associated with type 1 diabetes, is difficult to determine because autoimmunity depends on variations in multiple genes, where the contribution of any one gene product is small. We investigated the mechanisms whereby a modest reduction in IL-2R signaling selectively in T lymphocytes influenced the development of diabetes in the NOD mouse model. The sensitivity of IL-2R signaling was reduced by about two- to threefold in Tregs from mice that coexpressed wild-type IL-2Rβ and a mutant subunit (IL-2RβY3) with reduced signaling (designated NOD-Y3). Male and female NOD-Y3 mice exhibited accelerated diabetes onset due to intrinsic effects on multiple activities in Tregs Bone marrow chimera and adoptive transfer experiments demonstrated that IL-2RβY3 Tregs resulted in impaired homeostasis of lymphoid-residing central Tregs and inefficient development of highly activated effector Tregs and that they were less suppressive. Pancreatic IL-2RβY3 Tregs showed impaired development into IL-10-secreting effector Tregs The pancreatic lymph nodes and pancreases of NOD-Y3 mice had increased numbers of antigen-experienced CD4+ effector T cells, which was largely due to impaired Tregs, because adoptively transferred pancreatic autoantigen-specific CD4+ Foxp3- T cells from NOD-Y3 mice did not accelerate diabetes in NOD.SCID recipients. Our study indicates that the primary defect associated with chronic, mildly reduced IL-2R signaling is due to impaired Tregs that cannot effectively produce and maintain highly functional tissue-seeking effector Treg subsets.
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Affiliation(s)
- Connor J Dwyer
- Department of Microbiology and Immunology, Miller School of Medicine, University of Miami, Miami, FL 33136, USA
| | - Allison L Bayer
- Department of Microbiology and Immunology, Miller School of Medicine, University of Miami, Miami, FL 33136, USA.,Diabetes Research Institute, Miller School of Medicine, University of Miami, Miami, FL 33136, USA
| | - Carmen Fotino
- Diabetes Research Institute, Miller School of Medicine, University of Miami, Miami, FL 33136, USA
| | - Liping Yu
- Barbara Davis Center for Childhood Diabetes, University of Colorado School of Medicine, Aurora, CO 80045, USA
| | - Cecilia Cabello-Kindelan
- Diabetes Research Institute, Miller School of Medicine, University of Miami, Miami, FL 33136, USA
| | - Natasha C Ward
- Department of Microbiology and Immunology, Miller School of Medicine, University of Miami, Miami, FL 33136, USA
| | - Kevin H Toomer
- Department of Microbiology and Immunology, Miller School of Medicine, University of Miami, Miami, FL 33136, USA
| | - Zhibin Chen
- Department of Microbiology and Immunology, Miller School of Medicine, University of Miami, Miami, FL 33136, USA.,Diabetes Research Institute, Miller School of Medicine, University of Miami, Miami, FL 33136, USA
| | - Thomas R Malek
- Department of Microbiology and Immunology, Miller School of Medicine, University of Miami, Miami, FL 33136, USA. .,Diabetes Research Institute, Miller School of Medicine, University of Miami, Miami, FL 33136, USA
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19
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Faleo G, Russ HA, Wisel S, Parent AV, Nguyen V, Nair GG, Freise JE, Villanueva KE, Szot GL, Hebrok M, Tang Q. Mitigating Ischemic Injury of Stem Cell-Derived Insulin-Producing Cells after Transplant. Stem Cell Reports 2017; 9:807-819. [PMID: 28803916 PMCID: PMC5599226 DOI: 10.1016/j.stemcr.2017.07.012] [Citation(s) in RCA: 33] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/23/2017] [Revised: 07/13/2017] [Accepted: 07/14/2017] [Indexed: 12/21/2022] Open
Abstract
The advent of large-scale in vitro differentiation of human stem cell-derived insulin-producing cells (SCIPC) has brought us closer to treating diabetes using stem cell technology. However, decades of experiences from islet transplantation show that ischemia-induced islet cell death after transplant severely limits the efficacy of the therapy. It is unclear to what extent human SCIPC are susceptible to ischemia. In this study, we show that more than half of SCIPC die shortly after transplantation. Nutrient deprivation and hypoxia acted synergistically to kill SCIPC in vitro. Amino acid supplementation rescued SCIPC from nutrient deprivation, likely by providing cellular energy. Generating SCIPC under physiological oxygen tension of 5% conferred hypoxia resistance without affecting their differentiation or function. A two-pronged strategy of physiological oxygen acclimatization during differentiation and amino acid supplementation during transplantation significantly improved SCIPC survival after transplant. Stem cell-derived insulin-producing cells (SCIPC) are susceptible to ischemic injury Amino acid supplementation prevents nutrient-deprivation-induced SCIPC death Generation of SCIPC at physiological oxygen levels protects them against hypoxia Both strategies combined preserve SCIPC graft viability in vivo upon transplant
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Affiliation(s)
- Gaetano Faleo
- Department of Surgery, University of California San Francisco, San Francisco, CA 94143, USA
| | - Holger A Russ
- UCSF Diabetes Center, University of California San Francisco, San Francisco, CA 94143, USA; Barbara Davis Center for Diabetes, School of Medicine, University of Colorado Denver, Aurora, CO 80045, USA
| | - Steven Wisel
- Department of Surgery, University of California San Francisco, San Francisco, CA 94143, USA
| | - Audrey V Parent
- UCSF Diabetes Center, University of California San Francisco, San Francisco, CA 94143, USA
| | - Vinh Nguyen
- Department of Surgery, University of California San Francisco, San Francisco, CA 94143, USA
| | - Gopika G Nair
- UCSF Diabetes Center, University of California San Francisco, San Francisco, CA 94143, USA
| | - Jonathan E Freise
- Department of Surgery, University of California San Francisco, San Francisco, CA 94143, USA
| | - Karina E Villanueva
- UCSF Diabetes Center, University of California San Francisco, San Francisco, CA 94143, USA
| | - Gregory L Szot
- Department of Surgery, University of California San Francisco, San Francisco, CA 94143, USA
| | - Matthias Hebrok
- UCSF Diabetes Center, University of California San Francisco, San Francisco, CA 94143, USA
| | - Qizhi Tang
- Department of Surgery, University of California San Francisco, San Francisco, CA 94143, USA; UCSF Diabetes Center, University of California San Francisco, San Francisco, CA 94143, USA.
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20
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Conway B, Innes KE, Long D. Perfluoroalkyl substances and beta cell deficient diabetes. J Diabetes Complications 2016; 30:993-8. [PMID: 27311784 PMCID: PMC5556924 DOI: 10.1016/j.jdiacomp.2016.05.001] [Citation(s) in RCA: 44] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/29/2015] [Revised: 04/27/2016] [Accepted: 05/02/2016] [Indexed: 01/09/2023]
Abstract
AIMS Perfluoroalkyl substances (PFAS) are synthetic hydrocarbons shown to preserve pancreatic islet cell viability and reduce islet cell hypoxia and apoptosis. We investigated the relationship of serum PFAS with diabetes, and whether this varied by diabetes type. METHODS 6,460 individuals with and 60,439 without diabetes from the C8 Health Project, were categorized into three groups: type 1 (n=820), type 2 (n=4,291), or uncategorized diabetes (n=1,349, missing data on diabetes type or diabetes based on blood sugar at study entry). Four PFAS were investigated: perfluorohexane sulfonate (PFHxS), perfluorooctanoic acid (PFOA), perfluorooctane sulfonate (PFOS), and perfluorononaoic acid (PFNA). RESULTS PFAS levels were significantly lower in those with diabetes, and lowest in those with type 1 diabetes. In age and sex adjusted analyses, ORs (CI) for type 1, type 2, and uncategorized diabetes compared to no diabetes were 0.59 (0.54-0.64), 0.74 (0.71-0.77), 0.84 (0.78-0.90), respectively for PFHxS; 0.69 (0.65-0.74), 0.87 (0.89-0.91), 0.92 (0.88-0.97), respectively for PFOA; 0.65 (0.61-0.70), 0.86 (0.82-0.90), 0.93 (0.86-1.03), respectively for PFOS; and 0.65 (0.57-0.74), 0.94 (0.88-1.00), 0.95 (0.85-1.06), respectively for PFNA. Further adjustment for eGFR and other covariates did not eliminate these inverse associations. CONCLUSIONS PFAS levels were negatively associated with diabetes. This inverse relationship was strongest for type 1 diabetes, suggesting the relationship with serum PFAS may vary with the severity of islet cell deficiency.
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Affiliation(s)
- Baqiyyah Conway
- Department of Epidemiology, West Virginia University, P.O. Box 9127, Morgantown, WV 26505.
| | - Karen E Innes
- Department of Epidemiology, West Virginia University, P.O. Box 9127, Morgantown, WV 26505
| | - Dustin Long
- Department of Biostatistics, West Virginia University, P.O. Box 9127, Morgantown, WV 26505
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21
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Shahbazov R, Kanak MA, Takita M, Kunnathodi F, Khan O, Borenstein N, Lawrence MC, Levy MF, Naziruddin B. Essential phospholipids prevent islet damage induced by proinflammatory cytokines and hypoxic conditions. Diabetes Metab Res Rev 2016; 32:268-77. [PMID: 26378630 DOI: 10.1002/dmrr.2714] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/08/2015] [Revised: 07/10/2015] [Accepted: 08/03/2015] [Indexed: 01/19/2023]
Abstract
BACKGROUND The pancreatic islet damage that occurs through an inflammatory response and hypoxia after infusion is a major hurdle in islet transplantation. Because essential phospholipids (EPL) have been shown to exhibit anti-inflammatory properties in liver disease, we analysed their protective effect on islets in inflammatory or hypoxic conditions. METHODS We evaluated the viability of mouse and human islets cultured with cytokines or in hypoxic conditions for 48 h and measured cytokine expression in islets by quantitative polymerase chain reaction. We then employed an in vivo mouse assay, transplanting a marginal dose of human islets treated with or without EPL into the subcapsule of the kidney in diabetic nude mice and determining the cure rate. RESULTS The viability of mouse and human islets damaged by cytokines was significantly improved by supplementation of EPL in the culture (p = 0.003 and <0.001 for mouse and human islets respectively). EPL significantly inhibited intracellular expression of IL-1β and IL-6 in cytokine-damaged human islets (p < 0.001). The viability of human islets in hypoxic conditions was significantly better when treated with EPL (p < 0.001). In the in vivo mouse assay, the EPL-treated islet group had a higher cure rate than the untreated control, with marginal statistical significance (75 and 17% respectively, p = 0.07). CONCLUSIONS EPL could be a potent agent to protect islets from inflammatory and hypoxic conditions after isolation procedures. Further studies to clarify the effect of EPL in islet transplantation are warranted.
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Affiliation(s)
- Rauf Shahbazov
- Islet Cell Laboratory, Baylor Research Institute, Dallas, TX, USA
| | - Mazhar A Kanak
- The Institute of Biomedical Studies, Baylor University, Waco, TX, USA
| | - Morihito Takita
- Islet Cell Laboratory, Baylor Research Institute, Dallas, TX, USA
| | | | - Omar Khan
- Islet Cell Laboratory, Baylor Research Institute, Dallas, TX, USA
| | - Nofit Borenstein
- Islet Cell Laboratory, Baylor Research Institute, Dallas, TX, USA
| | | | - Marlon F Levy
- Baylor Annette C. and Harold C. Simmons Transplant Institute, Baylor University Medical Center, Dallas, TX, USA
| | - Bashoo Naziruddin
- Baylor Annette C. and Harold C. Simmons Transplant Institute, Baylor University Medical Center, Dallas, TX, USA
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22
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TAK1 inhibition prevents the development of autoimmune diabetes in NOD mice. Sci Rep 2015; 5:14593. [PMID: 26459028 PMCID: PMC4602205 DOI: 10.1038/srep14593] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/08/2015] [Accepted: 09/02/2015] [Indexed: 01/29/2023] Open
Abstract
Transforming growth factor-β activated kinase-1 (TAK1, Map3k7), a member of the mitogen-activated protein kinase kinase kinase (MAP3K) family, is essential in innate and adaptive immune responses. We postulated that blockade of TAK1 would affect autoimmune diabetes in non-obese diabetic (NOD) mice. Administration of 5Z-7-oxozeaenol (OZ), a TAK1 inhibitor, decreased the incidence and delayed the onset of autoimmune diabetes in both spontaneous and accelerated (cyclophosphamide-induced) experimental NOD mice. OZ also reduced insulitis, preserved islet function, increased the expression of α1- antitrypsin (AAT), and severely inhibited NF-κB and JNK/AP-1 signaling pathways in immune organs and pancreatic tissues. Importantly, TAK1 inhibition by OZ elicited a Th1 to Th2 cytokine shift, and increased TGF-β1 production in cultured T lymphocytes supernatants. Systemic TAK1 inhibition induced immature DCs with lower expressions of MHC-II and CD86, attenuated DC-mediated T cell proliferation in allogeneic MLR, and production of cytokine IL-12p70 in DCs suspensions. The results indicate that TAK1 inhibition with OZ was associated with a lower frequency of autoimmune diabetes in NOD mice. The net effect of TAK1 inhibition in NOD mice therefore appears to be protective rather than disease-enhancing. Strategies targeting TAK1 specifically in NOD mice might prove useful for the treatment of autoimmune diabetes in general.
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23
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Abstract
Autoantibodies are valuable markers for the recognition of autoimmune diseases. Over the last 25 years, several investigators have consistently shown that autoantibodies precede the clinical onset of cognate diseases by years or decades. This phenomenon, regularly observed in the natural history of autoimmune diseases, indicates that autoimmunity develops through successive stages across a variable period of time until the characteristic manifestations of disease are clinically apparent. Recent evidence indicates that the pre-clinical stages of autoimmune diseases involve a series of immunologic derangements and that this process is dynamic and progressive. During the years preceding clinical disease onset, there is progressive intensification in the humoral autoimmune response, characterized by increases in autoantibody titer, avidity, number of immunoglobulin isotypes, and spread of epitopes and of autoantigens targeted. This scenario is reminiscent of cancer processes that develop slowly by means of progressive stages, and may be interrupted by early detection and therapeutic intervention. Therefore, it might be reasoned that early intervention may be more effective in reverting the less firmly established autoimmune abnormalities at the pre-clinical stage of autoimmunity. With the continuous progress in novel immunologic therapeutic strategies, one can envision the possibility that early intervention at pre-clinical stages may lead to prevention of overt disease development and even cure of the autoimmune disorder.
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Affiliation(s)
- A Dellavance
- Research and Development Division, Fleury Medicine and Health Laboratories, São Paulo, Brazil
| | - L E Coelho Andrade
- Rheumatology Division, Escola Paulista de Medicina, Universidade Federal de São Paulo, Brazil
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24
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Powell DR, Doree D, Jeter-Jones S, Ding ZM, Zambrowicz B, Sands A. Sotagliflozin improves glycemic control in nonobese diabetes-prone mice with type 1 diabetes. Diabetes Metab Syndr Obes 2015; 8:121-7. [PMID: 25759591 PMCID: PMC4346285 DOI: 10.2147/dmso.s76342] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/30/2022] Open
Abstract
PURPOSE Oral agents are needed that improve glycemic control without increasing hypoglycemic events in patients with type 1 diabetes (T1D). Sotagliflozin may meet this need, because this compound lowers blood glucose through the insulin-independent mechanisms of inhibiting kidney SGLT2 and intestinal SGLT1. We examined the effect of sotagliflozin on glycemic control and rate of hypoglycemia measurements in T1D mice maintained on a low daily insulin dose, and compared these results to those from mice maintained in better glycemic control with a higher daily insulin dose alone. MATERIALS AND METHODS Nonobese diabetes-prone mice with cyclophosphamide-induced T1D were randomized to receive one of four daily treatments: 0.2 U insulin/vehicle, 0.05 U insulin/vehicle, 0.05 U insulin/2 mg/kg sotagliflozin or 0.05 U insulin/30 mg/kg sotagliflozin. Insulin was delivered subcutaneously by micro-osmotic pump; the day after pump implantation, mice received their first of 22 once-daily oral doses of sotagliflozin or vehicle. Glycemic control was monitored by measuring fed blood glucose and hemoglobin A1c levels. RESULTS Blood glucose levels decreased rapidly and comparably in the 0.05 U insulin/sotagliflozin-treated groups and the 0.2 U insulin/vehicle group compared to the 0.05 U insulin/vehicle group, which had significantly higher levels than the other three groups from day 2 through day 23. A1c levels were also significantly higher in the 0.05 U insulin/vehicle group compared to the other three groups on day 23. Importantly, the 0.2 U insulin/vehicle group had, out of 100 blood glucose measurements, 13 that were <70 mg/dL compared to one of 290 for the other three groups combined. CONCLUSION Sotagliflozin significantly improved glycemic control, without increasing the rate of hypoglycemia measurements, in diabetic mice maintained on a low insulin dose. This sotagliflozin-mediated improvement in glycemic control was comparable to that achieved by raising the insulin dose alone, but was not accompanied by the increased rate of hypoglycemia measurements observed with the higher insulin dose.
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Affiliation(s)
- David R Powell
- Lexicon Pharmaceuticals, The Woodlands, TX, USA
- Correspondence: David R Powell, Lexicon Pharmaceuticals, 8800 Technology Forest Place, The Woodlands, TX 77381-1160, USA, Tel +1 281 863 3060, Fax +1 281 863 8115, Email
| | - Deon Doree
- Lexicon Pharmaceuticals, The Woodlands, TX, USA
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25
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Kim HR, Kim JH, Choi EJ, Lee YK, Kie JH, Jang MH, Seoh JY. Hyperoxygenation attenuated a murine model of atopic dermatitis through raising skin level of ROS. PLoS One 2014; 9:e109297. [PMID: 25275529 PMCID: PMC4183587 DOI: 10.1371/journal.pone.0109297] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/03/2014] [Accepted: 08/30/2014] [Indexed: 11/25/2022] Open
Abstract
Atopic dermatitis (AD) is a chronic inflammatory skin disease resulting from excessive stimulation of immune cells. Traditionally, reactive oxygen species (ROS) have been implicated in the progression of inflammatory diseases, but several opposing observations suggest the protective role of ROS in inflammatory disease. Recently, we demonstrated ROS prevented imiquimod-induced psoriatic dermatitis through enhancing regulatory T cell function. Thus, we hypothesized AD might also be attenuated in elevated levels of ROS through tissue hyperoxygenation, such as by hyperbaric oxygen therapy (HBOT) or applying an oxygen-carrying chemical, perfluorodecalin (PFD). Elevated levels of ROS in the skin have been demonstrated directly by staining with dihydroethidum as well as indirectly by immunohistochemistry (IHC) for indoleamine 2,3-dioxygenase (IDO). A murine model of AD was developed by repeated application of a chemical irritant (1% 2,4-dinitrochlorobenzene) and house dust mite (Dermatophagoide farinae) extract on one ear of BALB/c mice. The results showed treatment with HBOT or PFD significantly attenuated AD, comparably with 0.1% prednicarbate without any signs of side effects, such as telangiectasia. The expressions of interleukin-17A and interferon-γ were also decreased in the AD lesions by treatment with HBOT or PFD. Enhanced expression of IDO and reduced level of hypoxia-inducible factor-1α, in association with increased frequency of FoxP3+ regulatory T cells in the AD lesions, might be involved in the underlying mechanism of oxygen therapy. Taken together, it was suggested that tissue hyperoxygenation, by HBOT or treatment with PFD, might attenuate AD through enhancing skin ROS level.
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Affiliation(s)
- Hyung-Ran Kim
- Department of Microbiology, Ewha Womans University Graduate School of Medicine, Seoul, Republic of Korea
| | - Jung-Hwan Kim
- Academy of Immunology and Microbiology (AIM), Institute for Basic Science (IBS), Pohang, Republic of Korea
- Division of Integrative Biosciences and Biotechnology (IBB), Pohang University of Science and Technology, Pohang, Republic of Korea
| | - Eun-Jeong Choi
- Department of Microbiology, Ewha Womans University Graduate School of Medicine, Seoul, Republic of Korea
| | - Yeo Kyong Lee
- Ewha Womans University High School, Seoul, Republic of Korea
| | - Jeong-Hae Kie
- Pathology, National Health Insurance Cooperation Ilsan Hospital, Koyang, Republic of Korea
| | - Myoung Ho Jang
- Academy of Immunology and Microbiology (AIM), Institute for Basic Science (IBS), Pohang, Republic of Korea
- Division of Integrative Biosciences and Biotechnology (IBB), Pohang University of Science and Technology, Pohang, Republic of Korea
- * E-mail: (MHJ); (JYS)
| | - Ju-Young Seoh
- Department of Microbiology, Ewha Womans University Graduate School of Medicine, Seoul, Republic of Korea
- * E-mail: (MHJ); (JYS)
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Fotino C, Molano RD, Ricordi C, Pileggi A. Transdisciplinary approach to restore pancreatic islet function. Immunol Res 2014; 57:210-21. [PMID: 24233663 DOI: 10.1007/s12026-013-8437-4] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
The focus of our research is on islet immunobiology. We are exploring novel strategies that could be of assistance in the treatment and prevention of type 1 diabetes, as well as in the restoration of metabolic control via transplantation of insulin producing cells (i.e., islet cells). The multiple facets of diabetes and β-cell replacement encompass different complementary disciplines, such as immunology, cell biology, pharmacology, and bioengineering, among others. Through their interaction and integration, a transdisciplinary dimension is needed in order to address and overcome all aspects of the complex puzzle toward a successful clinical translation of a biological cure for diabetes.
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27
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Ye X, Zhang J, Lu R, Zhou G. HBO: a possible supplementary therapy for oral potentially malignant disorders. Med Hypotheses 2014; 83:131-6. [PMID: 24908359 DOI: 10.1016/j.mehy.2014.05.011] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/19/2013] [Revised: 04/15/2014] [Accepted: 05/13/2014] [Indexed: 12/25/2022]
Abstract
Oral potentially malignant disorders (OPMDs) are chronic inflammatory diseases in which cells suffer hypoxia referring to deprivation of adequate oxygen supply. Hyperbaric oxygen treatment (HBO), which can increase oxygen tension and delivery to oxygen-deficient tissue, is a supplementary therapy to improve or cure disorders involving hypoxia. Although the applications of HBO in wound healings, acute ischemic stroke, radiation-induced soft tissue injury and cancers are extensively reported, there are only few studies on their effect in OPMDs. Not only does HBO furnish oxygen-it also possesses potent anti-inflammatory properties. At the cellular level, HBO can decrease lymphocyte proliferation and promote apoptosis of fibroblasts. At the molecular level, it can decrease expression of HIF, ICAM-1, TNF-α, TGF-β, and IFN-γ, as well as increase vascular VEGF expression and angiogenesis. Thus, we hypothesize that HBO may contribute to treat OPMDs, including oral lichen planus, oral leukoplakia, and oral submucous fibrosis both at the cellular level and the molecular level, and that it would be a safe and inexpensive therapeutic strategy.
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Affiliation(s)
- Xiaojing Ye
- The State Key Laboratory Breeding Base of Basic Science of Stomatology (Hubei-MOST) and Key Laboratory of Oral Biomedicine Ministry of Education, School and Hospital of Stomatology, Wuhan University, Wuhan, PR China
| | - Jing Zhang
- The State Key Laboratory Breeding Base of Basic Science of Stomatology (Hubei-MOST) and Key Laboratory of Oral Biomedicine Ministry of Education, School and Hospital of Stomatology, Wuhan University, Wuhan, PR China
| | - Rui Lu
- The State Key Laboratory Breeding Base of Basic Science of Stomatology (Hubei-MOST) and Key Laboratory of Oral Biomedicine Ministry of Education, School and Hospital of Stomatology, Wuhan University, Wuhan, PR China
| | - Gang Zhou
- The State Key Laboratory Breeding Base of Basic Science of Stomatology (Hubei-MOST) and Key Laboratory of Oral Biomedicine Ministry of Education, School and Hospital of Stomatology, Wuhan University, Wuhan, PR China; Department of Oral Medicine, School and Hospital of Stomatology, Wuhan University, PR China.
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28
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Kim HR, Lee A, Choi EJ, Hong MP, Kie JH, Lim W, Lee HK, Moon BI, Seoh JY. Reactive oxygen species prevent imiquimod-induced psoriatic dermatitis through enhancing regulatory T cell function. PLoS One 2014; 9:e91146. [PMID: 24608112 PMCID: PMC3946742 DOI: 10.1371/journal.pone.0091146] [Citation(s) in RCA: 64] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/16/2014] [Accepted: 02/07/2014] [Indexed: 11/29/2022] Open
Abstract
Psoriasis is a chronic inflammatory skin disease resulting from immune dysregulation. Regulatory T cells (Tregs) are important in the prevention of psoriasis. Traditionally, reactive oxygen species (ROS) are known to be implicated in the progression of inflammatory diseases, including psoriasis, but many recent studies suggested the protective role of ROS in immune-mediated diseases. In particular, severe cases of psoriasis vulgaris have been reported to be successfully treated by hyperbaric oxygen therapy (HBOT), which raises tissue level of ROS. Also it was reported that Treg function was closely associated with ROS level. However, it has been only investigated in lowered levels of ROS so far. Thus, in this study, to clarify the relationship between ROS level and Treg function, as well as their role in the pathogenesis of psoriasis, we investigated imiquimod-induced psoriatic dermatitis (PD) in association with Treg function both in elevated and lowered levels of ROS by using knockout mice, such as glutathione peroxidase-1−/− and neutrophil cytosolic factor-1−/− mice, as well as by using HBOT or chemicals, such as 2,3-dimethoxy-1,4-naphthoquinone and N-acetylcysteine. The results consistently showed Tregs were hyperfunctional in elevated levels of ROS, whereas hypofunctional in lowered levels of ROS. In addition, imiquimod-induced PD was attenuated in elevated levels of ROS, whereas aggravated in lowered levels of ROS. For the molecular mechanism that may link ROS level and Treg function, we investigated the expression of an immunoregulatory enzyme, indoleamine 2,3-dioxygenase (IDO) which is induced by ROS, in PD lesions. Taken together, it was implied that appropriately elevated levels of ROS might prevent psoriasis through enhancing IDO expression and Treg function.
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Affiliation(s)
- Hyung-Ran Kim
- Department of Microbiology, Ewha Womans University Graduate School of Medicine, Seoul, Korea
| | - Anbok Lee
- Department of Surgery, Ewha Womans University Graduate School of Medicine, Seoul, Korea
| | - Eun-Jeong Choi
- Department of Microbiology, Ewha Womans University Graduate School of Medicine, Seoul, Korea
| | - Min-Pyo Hong
- College of Arts and Sciences, Boston College, Chestnut Hill, Massachusetts, United States of America
| | - Jeong-Hae Kie
- Pathology, National Health Insurance Cooperation Ilsan Hospital, Koyang, Korea
| | - Woosung Lim
- Department of Surgery, Ewha Womans University Graduate School of Medicine, Seoul, Korea
| | - Hyeon Kook Lee
- Department of Surgery, Ewha Womans University Graduate School of Medicine, Seoul, Korea
| | - Byung-In Moon
- Department of Surgery, Ewha Womans University Graduate School of Medicine, Seoul, Korea
| | - Ju-Young Seoh
- Department of Microbiology, Ewha Womans University Graduate School of Medicine, Seoul, Korea
- * E-mail:
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Miska J, Abdulreda MH, Devarajan P, Lui JB, Suzuki J, Pileggi A, Berggren PO, Chen Z. Real-time immune cell interactions in target tissue during autoimmune-induced damage and graft tolerance. ACTA ACUST UNITED AC 2014; 211:441-56. [PMID: 24567447 PMCID: PMC3949570 DOI: 10.1084/jem.20130785] [Citation(s) in RCA: 53] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
Abstract
Real-time imaging studies are reshaping immunological paradigms, but a visual framework is lacking for self-antigen-specific T cells at the effector phase in target tissues. To address this issue, we conducted intravital, longitudinal imaging analyses of cellular behavior in nonlymphoid target tissues to illustrate some key aspects of T cell biology. We used mouse models of T cell-mediated damage and protection of pancreatic islet grafts. Both CD4(+) and CD8(+) effector T (Teff) lymphocytes directly engaged target cells. Strikingly, juxtaposed β cells lacking specific antigens were not subject to bystander destruction but grew substantially in days, likely by replication. In target tissue, Foxp3(+) regulatory T (Treg) cells persistently contacted Teff cells with or without involvement of CD11c(+) dendritic cells, an observation conciliating with the in vitro "trademark" of Treg function, contact-dependent suppression. This study illustrates tolerance induction by contact-based immune cell interaction in target tissues and highlights potentials of tissue regeneration under antigenic incognito in inflammatory settings.
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Affiliation(s)
- Jason Miska
- Department of Microbiology and Immunology and 2 Department of Surgery, 3 Diabetes Research Institute, University of Miami Miller School of Medicine, Miami, FL 33136 4 Department of Biomedical Engineering, University of Miami, Coral Gables, FL 33124
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Cechin S, Alvarez-Cubela S, Giraldo JA, Molano RD, Villate S, Ricordi C, Pileggi A, Inverardi L, Fraker CA, Domínguez-Bendala J. Influence of in vitro and in vivo oxygen modulation on β cell differentiation from human embryonic stem cells. Stem Cells Transl Med 2013; 3:277-89. [PMID: 24375542 DOI: 10.5966/sctm.2013-0160] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022] Open
Abstract
The possibility of using human embryonic stem (hES) cell-derived β cells as an alternative to cadaveric islets for the treatment of type 1 diabetes is now widely acknowledged. However, current differentiation methods consistently fail to generate meaningful numbers of mature, functional β cells. In order to address this issue, we set out to explore the role of oxygen modulation in the maturation of pancreatic progenitor (PP) cells differentiated from hES cells. We have previously determined that oxygenation is a powerful driver of murine PP differentiation along the endocrine lineage of the pancreas. We hypothesized that targeting physiological oxygen partial pressure (pO2) levels seen in mature islets would help the differentiation of PP cells along the β-cell lineage. This hypothesis was tested both in vivo (by exposing PP-transplanted immunodeficient mice to a daily hyperbaric oxygen regimen) and in vitro (by allowing PP cells to mature in a perfluorocarbon-based culture device designed to carefully adjust pO2 to a desired range). Our results show that oxygen modulation does indeed contribute to enhanced maturation of PP cells, as evidenced by improved engraftment, segregation of α and β cells, body weight maintenance, and rate of diabetes reversal in vivo, and by elevated expression of pancreatic endocrine makers, β-cell differentiation yield, and insulin production in vitro. Our studies confirm the importance of oxygen modulation as a key variable to consider in the design of β-cell differentiation protocols and open the door to future strategies for the transplantation of fully mature β cells.
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Affiliation(s)
- Sirlene Cechin
- Diabetes Research Institute, Department of Surgery, Department of Microbiology and Immunology, Department of Biomedical Engineering, Department of Medicine, and Department of Cell Biology and Anatomy, Miller School of Medicine, University of Miami, Miami, Florida, USA
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Drenjancevic I, Kibel A. Restoring Vascular Function with Hyperbaric Oxygen Treatment: Recovery Mechanisms. J Vasc Res 2013; 51:1-13. [DOI: 10.1159/000355925] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/21/2013] [Accepted: 09/05/2013] [Indexed: 11/19/2022] Open
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Efferocytosis promotes suppressive effects on dendritic cells through prostaglandin E2 production in the context of autoimmunity. PLoS One 2013; 8:e63296. [PMID: 23691013 PMCID: PMC3654963 DOI: 10.1371/journal.pone.0063296] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/11/2012] [Accepted: 04/02/2013] [Indexed: 12/31/2022] Open
Abstract
Introduction Efferocytosis is a crucial process by which apoptotic cells are cleared by phagocytes, maintaining immune tolerance to self in the absence of inflammation. Peripheral tolerance, lost in autoimmune processes, may be restored by the administration of autologous dendritic cells loaded with islet apoptotic cells in experimental type 1 diabetes. Objective To evaluate tolerogenic properties in dendritic cells induced by the clearance of apoptotic islet cells, thus explaining the re-establishment of tolerance in a context of autoimmunity. Methods Bone marrow derived dendritic cells from non-obese diabetic mice, a model of autoimmune diabetes, were generated and pulsed with islet apoptotic cells. The ability of these cells to induce autologous T cell proliferation and to suppress mature dendritic cell function was assessed, together with cytokine production. Microarray experiments were performed using dendritic cells to identify differentially expressed genes after efferocytosis. Results Molecular and functional changes in dendritic cells after the capture of apoptotic cells were observed. 1) Impaired ability of dendritic cells to stimulate autologous T cell proliferation after the capture of apoptotic cells even after proinflammatory stimuli, with a cytokine profile typical for immature dendritic cells. 2) Suppressive ability of mature dendritic cell function. 3) Microarray-based gene expression profiling of dendritic cells showed differential expression of genes involved in antigen processing and presentation after efferocytosis. 4) Prostaglandin E2 increased production was responsible for immunosuppressive mechanism of dendritic cells after the capture of apoptotic cells. Conclusions The tolerogenic behaviour of dendritic cells after islet cells efferocytosis points to a mechanism of silencing potential autoreactive T cells in the microenvironment of autoimmunity. Our results suggest that dendritic cells may be programmed to induce specific immune tolerance using apoptotic cells; this is a viable strategy for a variety of autoimmune diseases.
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Affiliation(s)
| | - Yogish C. Kudva
- Division of Endocrinology and Metabolism, Mayo Clinic, Rochester, Minnesota
| | - Chella S. David
- Department of Immunology, Mayo Clinic, Rochester, Minnesota
- Corresponding author: Chella S. David,
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